... , prompt delivery 3,Low noise, long life NSK 6407-ZZ Deep groove ball bearingDeep groove ball bearings mainly take radial ... structure.Features : Shield / closure: open ball bearing, Z, ZZ, RS, 2RS,2RZBall bearings snap ring: N, NRTolerance codes: ABEC-1, ABEC ... electric mo Features : Shield / closure: open ball bearing, Z, ZZ, RS, 2RS,2RZBall bearings snap ring: N, NRTolerance codes: ABEC-1, ABEC ...